cocos2d-x3.0 RenderTexture(二)

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#include "cocos-ext.h"#include "ui/CocosGUI.h"#include "cocostudio/CocoStudio.h"USING_NS_CC;USING_NS_CC_EXT;using namespace ui;

.cpp

   auto background = LayerColor::create(Color4B(200,200,200,255));        addChild(background);                        auto s = Director::getInstance()->getWinSize();        auto spr_premulti = Sprite::create("fire.png");        spr_premulti->setPosition(Point(s.width/2-16, s.height/2+36));                                                        auto spr_nonpremulti = Sprite::create("fire.png");        spr_nonpremulti->setPosition(Point(s.width/2-16, s.height/2-16));////        /* A2 & B2 setup */        //着色文理     create参数1、着色的宽 2、着色的高  3、颜色        auto rend = RenderTexture::create(s.width, s.height, Texture2D::PixelFormat::RGBA8888);                auto spr_size = spr_premulti->getContentSize();        rend->setKeepMatrix(true);        Size pixelSize = Director::getInstance()->getWinSizeInPixels();                rend->setVirtualViewport(Point(0, 0), Rect(0, 0, s.width, s.height), Rect(0, 0, pixelSize.width, pixelSize.height));                        // It's possible to modify the RenderTexture blending function by        //        [[rend sprite] setBlendFunc:(BlendFunc) {GL_ONE, GL_ONE_MINUS_SRC_ALPHA}];        rend->begin();                spr_premulti->visit();        spr_nonpremulti->visit();        rend->end();        rend->setPosition(Point(s.width / 2 + 56, s.height / 2));               addChild(spr_premulti);        addChild(spr_nonpremulti);               addChild(rend);

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